L
- Laguna – Macintosh Portable
- Lanai – iBook
- LAW (Lawyers Are Wimps) – Power Macintosh 7100
- LD50 – Macintosh TV
- Leopard – Mac OS X 10.5
- Leopard – Mac OS X Server 10.5
- Life Savers – iMac (5 Flavors)
- Limelight – Mac OS 9.2.1
- Lisa – Macintosh XL
- Little Bear - iPhone OS 1.1.3, 1.1.4, and 1.1.5
- Little Big Mac – Macintosh II
- Lombard – PowerBook G3 (Bronze Keyboard)
- LU1 – Mac OS 9.2.2
Read more about this topic: List Of Apple Codenames